Brake rod construction



Sept. 26, 1933. R, c, WARREN BRAKE ROD cousmucnon Filed Aug. 31, 1932 2%; Wa'rrew Patented Sept. 26, 1933 w UNITED STATES PATENT OFFICE BltAKE ROD CONSTRUCTION Roland 0. Warren, Trenton, N. J. Application August 31,1932. Serial No. 631,233

1 Claim. (Cl. 74-110) This invention relates to an improved brake numerals are employed to designate like parts rod for use in the construction of mechanical throughout the same. brakes whether operated through the medium of Figure l isa side elevational view of the ima foot pedal or a hand lever. proved structure as designed and mechanically Briefly stated, the salient novelty is predicated coordinated in accordance with the principles of 60 upon the use of a brake rod comprising a pair this invention. of companion sections whose adjacent inner ends Figures 2 and 3 are elevational views showing are operatively coupled together through the the progressive starting and finishing positions intermediacy of unique means for increasing the 0 the novel converter diskleverage and intensifying the power of the brake Figure 4 is a section taken on the plane of the 5 band in a dependable and practicable manner. line 4-- of Figure 3.

My primary aim is to generally improve upon Referring first to Figure 1 of the drawing the brake rod structures possessing these general numeral5designatesa relatively stationary frame characteristics by providing an appreciably difier-. bar, 6 a hanger bracket rigidly secured thereto.

ent selection and assembly of parts intimately The brake band iS denoted y the numeral 7 and coordinated and designed to promote sensitivity the contracting and pa din lin e or means of operation, responsiveness, and continuity of y the numeral The brake pedal is denoted stress from the pedal to the brake band contractby the numeral 9 and the brake rod or reach rod ing means in order to gain advantages not hereas it is sometimes called, is made up of a pair of tofore accomplished in similar prior art devices comp sections 10 and 11 respectively e 7 with which I am adequately familiar, section 10 is secured to the brake pedal and the On the present day arrangement utilizing a section 11 to the band actuating means 8. The one piece brake rod, ap roximately one-half of inner ends of theserods are operatively joined the travel of the brake pedal is wasted in order to t th r y n v slack take p a compensattake up existing lost motion in the mechanism.' i me s w i means i constructed to pr vid 80 Manifestly by th tim the brake ba ds ar i the requisite progressive action of the rods 10 and braking contact with the drums, the greater por- 1 i rd to s u p dit u applicati n and tion of efiective movement of the brake pedal has release of the brake and '7- The means combeen spent with little travel of the rods. Conseprises essentially a Converter disk 12 having a quently only the latter stroke or half of the travel 13 pivotaily attached t0 a e bracket 85 of the brake pedal is directly eflective on the as at 14 in Figure 1. AS a matter Of distinction brake bands. I call attention to Figures 2 and 3 wherein it will Careful study and experimentation has e be observed that the rod 10 is provided at its abled me to discover a simple mechanical moveinner end with a fork 15 Carrying an anti-friction 3 ment, or association of elements embodied in a mile! Likewise, the 10d 11 is p v ded at a sectional brake rod which is advantageous in cflirespohdihg d with a duplicate fork 1'7 and spontaneously changing the ratio of travel of the a compiementai anti-friction 101161 These brake rod and pedal to the extent that the initial rollers cooperate w t a at am surfaces 16a movement of the pedal takes up the 1051; motion and 18a DIOVidBd in the disk 12. These surfaces 5 promptly during which time the travel of the 1611 and 1311 are formed PY providing s a ge ed 9 brake rod will be the greatest or greater than the slots 19 and 1!! i Incidentally it is pedal, while the latter movement of the brake obvioils from an exammatlon of Flgur? 2 that pedal will speed up the leverage and power the distance from the pivot 14 of the disk 12 to e embmcemeni of antecedents it? 3123235 555352; Oand aromjld lbs a.ssoclat.ed drum quick release of the slack. From this figure it is carrymg the mventwe conceptlon i also evident that the distance between the respectlce I h evolved and P an emclent tive rollers 16 and 18 is greatest at this particular struction which accomplishes this change of leverstarting position age in a satisfactory manner without involving In Figure 3 which i t finishing or stopping 105 y extensive change in the position of the brake position the leverage action changes, the position and n r in and p n i mean r fo t of the roller 18 being then closer to the pivot 14 pedal or any appreciable increase in the pressure than the position of said roller 16 to the same required for depressing the pedal. pivot point. This causes the pressure of the footv no In the accompanying drawing wherein like pedal to be multiplied at the brake band.

Under this arrangement it is obvious that at the first application of pressure on the foot pedal all the lost motion and brake band clearance is,

rapidly taken up without requiring an increase of pressure on the pedal or stress on the rods 10 and 11. Secondly when the brake band has closed tightly around the drum in order to produce the requisite braking eifect, the pressure on the foot pedal has been multiplied through the activity tion has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

What is claimed is:

In a structure of the class described, a disk having an ear projecting from a part of its circumference, a pivot pin passing through said ear, said disk having a pair of substantially semi-circular openings therein, one opening being eccentrically arranged in the disk, a pair of rods, anti-friction means at the inner end ofeach rod, one engaging the arcuate wall of one opening and the other the arcuate wall of the other opening throughout the movement of the disk when said disk is moved by movement of one of the rods.

ROLAND C. WARREN. 

